Electromagnetic unit fuel injector
US4129256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1977 |
| Grant date | Dec 12, 1978 |
| Priority date | — |
| Expiry date | Sep 12, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electromagnetic unit fuel injector for use in a diesel engine has a pump, provided by a cam actuated plunger reciprocable in a bushing, for intensifying the pressure of fuel delivered to a spring biased closed, pressure actuated injection valve controlling flow discharge out through a spray outlet, to a pressure accumulator and through a throttling orifice passage into one end of a modulation pressure control chamber having an enlarged diameter stem portion of the injection valve therein, the modulation pressure control chamber downstream of the throttling orifice passage being connected by a conduit including a solenoid actuated valve controlling metering orifice with a low pressure fuel drain return line whereby the pressure of fuel in the modulation pressure control chamber acting on the enlarged diameter stem portion of the injection valve is modulated so as to control the seating and unseating of the injection valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.